反応 #1188

反応方程式

ethyl acetate

ammonium hydroxide

→

vinyl acetate

vinyl alcohol

溶媒

water

反応条件

後処理

1. 1
   workup.DISSOLUTIONthe polymer dissolved
2. 2
   その他to give a gel
3. 3
   その他During the next three weeks
4. 4
   その他at room temperature
5. 5
   温度At this time the solution was heated
6. 6
   その他to remove ammonia

実験手順

To 100 g of the same copolymer was added 1500 ml of ethyl acetate, 40 ml of concentrated ammonium hydroxide and 40 ml of water. After two days with stirring, the polymer dissolved to give a gel. During the next three weeks at room temperature, a progressive decrease in viscosity of the solution was noted. At this time the solution was heated to remove ammonia, giving a partially saponified polymer of composition 32.4 wt % vinyl acetate, 16.4 wt % vinyl alcohol, 38 wt % TFE, and 13.2 wt % HFP in a 27.4 wt % solids solution in ethyl acetate.

出典